admc331 Analog Devices, Inc., admc331 Datasheet - Page 3

• Manufacturer Part Number: admc331
• Description: Single Chip Dsp Motor Controller
• Manufacturer: Analog Devices, Inc.

TIMING PARAMETERS
Parameter
Clock Signals
t
to half the instruction rate; a 13 MHz input clock (which is equivalent to 76.9 ns)
yields a 38.5 ns processor cycle (equivalent to 26 MHz). t
of 0.5 t
specification value.
Example: t
Timing Requirements:
t
t
t
Switching Characteristics:
t
t
t
Control Signals
Timing Requirement:
t
PWM Shutdown Signals
Timing Requirement:
t
NOTE
1
Applies after power-up sequence is complete. Internal phase lock loop requires no more than 2000 CLKIN cycles assuming stable CLKIN (not including crystal
CK
CKI
CKIL
CKIH
CKL
CKH
CKOH
RSP
PWMTPW
oscillator start-up time).
is defined as 0.5 t
CKI
period should be substituted for all relevant timing parameters to obtain
CKH
= 0.5 t
CLKIN Period
CLKIN Width Low
CLKIN Width High
CLKOUT Width Low
CLKOUT Width High
CLKIN High to CLKOUT High
RESET Width Low
PWMTRIP Width Low
CKI
CK
. The ADMC331 uses an input clock with a frequency equal
– 10 ns = 0.5 (38.5 ns) – 10 ns = 9.25 ns.
CLKOUT
CLKIN
CK
t
CKIL
values within the range
t
CKL
t
CKI
t
t
CKOH
CKH
t
CKIH
Min
76.9
20
20
0.5 t
0.5 t
0
5 t
2 t
CK
CK
CK
CK
1
– 10
– 10
ADMC331
Max
150
20
Unit
ns
ns
ns
ns
ns
ns
ns
ns